Nature of spouse

https://vijayalur.wordpress.com/2013/12/21/simple-and-easy-way-to-decipher-d-9-navamsha-chart/
As mentioned in the above link,

Nature of Spouse

• The native will get beautiful, cultured, intelligent wife and will be prosperous and wealthy in his life if Navamsha Lagna Lord is
  • Exalted, in Moola Trikona or in Own house.
  • In other Vargas posited in Kendra / Trikona
  • Do not have any aspect / association with malefics.
• If Navamsha Lagna Lord is in Dusthana, debilitatated and has aspects of malefics, the native will get mediocre / bad natured wife.